Delays

Functions
void	delay_msec (unsigned int ms)
void	delay_sec (unsigned int seconds)

Detailed Description

These functions provide a convenient interface for pausing the program for a given amount of time before proceeding.

Function Documentation

delay_msec()

void delay_msec

(

unsigned int

ms

)

Spin delay about ms milliseconds, up to a maximum of 65,536 ms.

Parameters

ms	Delay in milliseconds

The current implementation will actually go slightly over since it doesn't account for function call, loop, and computational overhead. Each overhead instruction adds an additional 1/10 microsecond, so typical delays should be accurate to within a few microseconds.

If you want more accurate delays, use the delay*cty() functions directly. Since the VEX delay timer runs at 10MHz, they will produce the following delays:

delay10tcy() 1 us
delay100tcy() 10 us
delay1kcth() 100 us
delay10ktcy() 1 ms
delay100ktcy() 10 ms
delay1mtcy() 100 ms
However, be aware that all the delay*tcy() functions take an unsigned char argument, so they are limited to a maximum of 255 time units.

delay_sec()

void delay_sec

(

unsigned int

seconds

)

Spin delay about seconds seconds, up to a maximum of 65,536.

Parameters

seconds

Delay in seconds

The current implementation will actually go slightly over since it doesn't account for function call, loop, and computational overhead. Each overhead instruction adds an additional 1/10 microsecond, so typical delays should be accurate to within a few microseconds.

If you want more accurate delays, use the delay*cty() functions directly. Since the VEX delay timer runs at 10MHz, they will produce the following delays:

delay10tcy() 1 us
delay100tcy() 10 us
delay1kcth() 100 us
delay10ktcy() 1 ms
delay100ktcy() 10 ms
delay1mtcy() 100 ms
However, be aware that all the delay*tcy() functions take an unsigned char argument, so they are limited to a max of 255.